An electron enters an area of magnetic field of magnitude 0.010 0T, traveling perpendicular to the linear boundary of the area. The direction of field is perpendicular to the velocity of the electron.
i) Find out the time it takes for the electron to leave the "field-filled" area, noting that its path is a semi-circle.
ii) Determine the kinetic energy of the electron when the radius of the semi-circular path is 2.00 cm.